WICHITA, Kan. (CNN) In 2016, the seasonal flu vaccine effectiveness was just 42%, the US Centers for Disease Control and Prevention estimated. Even if vaccinated, people had inadequate protection against the flu.
CNN reports the limited effectivness was due to a mutatuon that occurred in the influenza A (H3N2) vaccine strain.
According to a Study published in the journal Proceedings of the National Academy of Sciences. This vaccine mutation resulted from an egg-based manufacting process that is used today.
Scott Hensley, author of the new study and an associate professor at the University of Pennslyvania says this could end up being a pretty bad flu season.
"Our best protection against severe illness is getting vaccinated with the flu shot we have today," says Hensley.
You can read the full report here: CNN Flu Story